Related Experiment Video
Updated: Apr 25, 2026
11:10
Hyperinsulinemic-euglycemic Clamps in Conscious, Unrestrained Mice
Published on: November 16, 2011
97.5K
Mechanisms of hypoglycemia and exercise-associated autonomic dysfunction
Stephen N Davis1, Donna Tate1, Maka S Hedrington1
1Baltimore, MD.
Summary
Intensifying diabetes control reduces complications but raises hypoglycemia risk. Prior hypoglycemia or exercise impairs the body's defenses against future low blood sugar, impacting neuroendocrine and autonomic responses.
Area of Science:
- Endocrinology
- Metabolic Disorders
- Neuroscience
Background:
- Diabetes mellitus is linked to microvascular and macrovascular complications.
- Intensified glucose control reduces these complications but increases hypoglycemia risk.
- Hypoglycemia is a significant concern for individuals with diabetes.
Purpose of the Study:
- To investigate the mechanisms underlying increased hypoglycemia risk with intensive diabetes therapy.
- To understand how prior hypoglycemia and exercise affect counterregulatory responses.
- To identify potential strategies for enhancing counterregulatory defenses.
Main Methods:
- Review of established knowledge on diabetes complications and glucose control.
- Analysis of studies investigating the impact of hypoglycemia and exercise on physiological responses.
- Examination of research identifying mechanisms of counterregulatory failure.
Main Results:
- Intensified glucose control in diabetes elevates hypoglycemia risk.
- Previous hypoglycemia or exercise blunts counterregulatory defenses against subsequent hypoglycemia.
- Both neuroendocrine and autonomic nervous system responses are diminished by prior hypoglycemia/exercise.
Conclusions:
- Understanding the physiological mechanisms of counterregulatory failure is crucial.
- Prior hypoglycemia and exercise impair the body's ability to manage subsequent low blood sugar.
- Further research into these mechanisms may lead to improved therapeutic approaches for hypoglycemia management.
More Related Videos
07:35Author Spotlight: Investigating the Blood Glucose Homeostasis in Murine Brain Using a Cost-Effective Hyperglycemic And Hypoglycemic Clamp Technique
Published on: January 26, 2024
2.1K
08:01Measurement of Insulin- and Contraction-Stimulated Glucose Uptake in Isolated and Incubated Mature Skeletal Muscle from Mice
Published on: May 16, 2021
5.5K
Related Concept Videos
01:26Hypoglycemia
22
Hypoglycemia is a blood glucose level below 70 mg/dL. It commonly occurs in individuals using insulin or insulin-secreting drugs, but may also arise in non-diabetic conditions. People with type 1 diabetes are at the highest risk because they depend on exogenous insulin. People with type 2 diabetes are also at risk, especially when treated with insulin or medications such as sulfonylureas, which increase insulin release regardless of blood glucose levels. It develops when insulin levels exceed...
22
01:15Hypoglycemia and Glucagon
1.3K
Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
1.3K
01:24Type II Diabetes II: Pathophysiology
12
PathophysiologyType 2 diabetes mellitus (T2DM ) is a chronic metabolic disorder characterized by insulin resistance and progressive pancreatic β-cell dysfunction, leading to impaired glucose homeostasis. It results from interactions among genetic predisposition, environmental factors, and metabolic stressors, such as overnutrition and a sedentary lifestyle.Insulin Resistance and Glucose DysregulationEarly T2DM involves insulin resistance in skeletal muscle, adipose tissue, and the liver.
12
01:29Hyperglycemia
23
Hyperglycemia is an abnormally high blood glucose level. It is diagnosed by fasting glucose ≥126 mg/dL, 2-hour oral glucose tolerance test (or OGTT) ≥200 mg/dL, random glucose ≥200 mg/dL with symptoms, or HbA1c ≥6.5%. However, HbA1c results may be unreliable in certain conditions, such as anemia or hemoglobinopathies, and the diagnosis should be confirmed unless classic symptoms are present. Postprandial hyperglycemia is typically considered significant when glucose...
23
01:18Disorders of the Autonomic Nervous System
1.8K
The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's...
Raynaud's disease, also known as Raynaud's...
1.8K
01:02Glucose Homeostasis: Regulation of Blood Glucose
4.3K
Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
4.3K